diff --git a/webadmin/src/views/settings.html b/webadmin/src/views/settings.html
index 8ab91980d..9853edae0 100644
--- a/webadmin/src/views/settings.html
+++ b/webadmin/src/views/settings.html
@@ -173,7 +173,7 @@
                             <input type="text" class="form-control" ng-model="configureBackup.bucket" id="inputConfigureBackupBucket" name="bucket" ng-disabled="configureBackup.busy" ng-required="s3like(configureBackup.provider)">
                         </div>
 
-                        <div class="form-group" ng-class="{ 'has-error': configureBackup.error.prefix }" ng-show="s3like(configureBackup.provider)">
+                        <div class="form-group" ng-class="{ 'has-error': configureBackup.error.prefix }" ng-show="configureBackup.provider !== 'filesystem'">
                             <label class="control-label" for="inputConfigureBackupPrefix">Prefix</label>
                             <input type="text" class="form-control" ng-model="configureBackup.prefix" id="inputConfigureBackupPrefix" name="prefix" ng-disabled="configureBackup.busy" placeholder="Prefix for backup file names">
                         </div>